Steam-boiler or other furnace



(No Model.)

E. H. REBS.

STEAM BoILBR 0R OTHER FURNAGE.

No. 302,940. Patented Aug. 5, l884 7i ff NA PETERS, Phmmuihugmpmr, wnhinglon. D. l:4

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SPECIFICATION forming p art of Letters PatentA No. 302,940, dated .August 5, 1884.

Application led Maigv d6, 1883. (Ne mollet! 1"@ @ZZ wiz/0111, t may concern-:x y.

Be it known that l, EITWARDl H. Rims, of Detroit, county of Vayne, State of Michigan, have invented a new and useful Improvement in Steam Boiler and other Furnaces; and I declare the followingto be afull, clear, and exact description of thesame, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings,which form apart of this specification.

My invention consists in the combinations of devices and appliances hereinafter specified, .and more particularly pointed out in the claims. l

In the drawings, Figure l is a vertical section of an apparatus embodying my invention. Fig. 2 is a longitudinal vertical section at right angles to Fig. l. Fig. 3 is a separate view of one of the sections of the perforated grate. Fig. 4 is a separate view of the steam-pipe.

The object ot' my inventionis to provide improved means whereby more perfect and thorough combustion may be secured in steamboiler and other furnaces,which shall prevent lhc escape of smoke and soot, economize fuel, and which maybe economically applied to any ordinary furnace.

In the drawings, A represents the walls of the furnace.

B is the boiler. p

C is the fire-box in the combustionchamber.

D represents ordinary firebars.

E represents my improved perforated grates located at the sides and in the center of the fire-box in proximity with the products of combustion.

E is a longitudinal bridge dividing the fireboX, said bridge constructed of perforated grates similar to those located at the sides of the fire-box. These perforated grates, forming the sides of the fire-box, and the longitudinal bridge, are preferably constructed in sections, as shown in Fig. 3, and may be located in any desired position, either vertically or inclined at a suitable angle with the fre-bars. These grates are also preferably constructed with an upper flange, the construction being su'ch that when two grates are placed in suitable position they will form a conical-shaped bridge, as shown in Fig. l, leaving a free air space, c, between said plates, and also when located against the walls of the furnace, a free air-space will be .left between the grate and the wall, as shown at c. These` perforated grates may be constructed of any suitable lengthand width and thickness, and be of any suitable shape to admit air freely through the perforations. I design to construct these grates of metal. Each grate may be constructed of one piece of casting,although it is myintention to construct themin sections, as shown in Fig. 3, the sides of c'ach section being preferably provided with notches ci, and also with dowels E, forsccuring the grate upon the firebars. I do not, however, limit myself to this precise construction of the sections, as they may be constructed in any suitable manner to be secured in place, and to be held properly together. As thusmade in section, there will be much less liability to crack and become imA paired, as the spaces between the sections would allow expansion and contraction with outinjury, and should any section become injured it could readily be replaced by another section. I propose to make these sections in duplicate, the same pattern forming the perforated grates for the sides of the combustion chamber, and also the adjacent grates otl the longitudinal bridge, although the pattern might be varied, if desired.

F is a steam-pipe located between the two portions of the bridge-wall E, and preferably at the base of the free air-spaces between them, said steam-pipe constructed to emit jiets of steam. As shown in Fig. 4, the steam-pipe is provided with a series of nipples, f, through which the steam may be emitted.

In operation, it is evident that currents of air will be drawn through the perforations of the grates, both at the sides ofthe combustionehamber and of the longitudinal bridge-wall. These grates,being intensely heated,will of ne cessity heat the air thoroughly before it comes in contact with the products of combustion,and prevent any cooling of the fire, as would be the case were cold currents of air introduced into the fireboX. In this manner the oxygen is plcntifully s upplied to said fire-box both below the surface of the burning fuel,and also imme- IOO diately above the fuel in connection with the gases generated, for, as illustrated in the drawings, the perforated grates are extended to a suitable distance above the surface of the fuel, so that the currents of air will be admitted to the products of combustion from the base of the fuel upon the fire-bars upward to the desired distance, to effectuallyaccomplish a perfect combustion, and` in addition to these currents of air so freely introduced into the rebox through the perforated plates the steam emitted from the pipe D in jets' also mingles with the currents passing through the' perforations of the grates to facilitate the combns-I tion. The admission of aspray of steam against the hot cones or grates,which are heated to 800o of heat, or more, is for the purpose of facilitating the production of hydrogen gas, and to increase the supplyl of oxygen through the perforations in the grate's, thereby producing immediate mixture of the gases ata point in the combustion-chamber hot enough to ignite the mixture and thereby produce thorough combustion of the same. By ejecting jets of steam against the hot grates, as described, it is important to observe thatthe gases are formed therefrom before being admitted into the oombastion-chamber. y

The perforated plates described may be employed with any ordinary grate-bars,and may be located in any ordinary combustion-chamber without any structural change either of the combustionchamber or of the grate-bars.v

By dispensing with any reconstruction of the combustionchamber or gratebars,thes e plates series of apertures, and arranged so as to leave tures, and arranged so as to leave an air-space4 vbetween the walls of the chamber in which the 're-box is formed and said plates, and communicating with the ash-pit, the base of said plates resting upon the fire-bars, and in combination therewith one or more steam-pipes for admitting steam into said air-spaces upon the back of said plates, substantially as described.

3. In afurnace,arebox having one or more of its walls formed of perforated plates, said plates constructed' and arranged to form airchambers, a vertical central air chamber formed of said plates, and in combination therewith one or more steam-pipes for admitting steam .into one or more of said air-chambers, substantially as described. d

4. The combination,with any ordinary combustion-chamber provided with any ordinary grate-bars, of perforated plates located upon one or more lof the walls of the combustionchamber, and arranged to leave air-spaces between the said walls and plates -communicat ing with the ash-pit, and in combination therewith a steam-pipe to introduce steam into said spaces and against the rear of said plates, substantially as described.

In testimony whereof I sign this specificati on in presence of two witnesses.

N. S. WRIGHT, WILLIAM F. FORD. 

